Construction Chemicals: Types, Uses, Standards and the Complete Product List

Construction chemicals are 15 families of formulated specialty products, from waterproofing membranes and repair mortars to sealants, floor coatings and fireproofing, that protect, repair, join, bed, level, finish or fire-protect concrete, masonry and structural steel. With 110 product classes and a standard behind most of them, which family solves which problem? The answer starts with the problem on the structure, then the substrate, then the standard and its edition, such as EN 1504-3:2005, ASTM C920-18(2024) or EN 12004:2007+A1:2012.

This page covers four things in order: the types of construction chemicals and how they work, where they are used, which European and US standards and rules govern them, and the complete list of all 15 families. The rules include dated VOC limits from 50 g/L (0.42 lb/gal) to 700 g/L (5.84 lb/gal) and the diisocyanate training duty in force since 2023-08-24. The same products sorted by structure and problem are under construction chemicals by application.

Every family here is a product class applied to a structure, not a single substance and not a concrete admixture added to the mix.

Standards, codes and regulations are checked against their issuing bodies, product values against the named data sheet and prices against the dated source named in the sentence; see our methodology and fact-checking.

What Are Construction Chemicals?#

Construction chemicals are formulated specialty products, applied on site or in precast plants, that waterproof, repair, protect, join, bed, level, finish, cure, release or fire-protect concrete, masonry and structural steel; they are product classes, not single substances. The hierarchy runs in four levels: construction chemicals, 15 families, 110 product classes, and the systems and grades that makers sell under trade names. A specifier chooses at the class level, for example an EN 1504-3:2005 R4 repair mortar, and then compares grades against that class. The test for whether a product belongs here is simple: is it a chemical product, or the standard or test for one, that a specifier, contractor or applicator selects and applies to protect, repair, join, bed, level, finish or fire-protect a structure?

Four groups of products sit outside that border. Concrete admixtures, integral and crystalline admixtures, corrosion-inhibiting admixtures, supplementary cementitious materials and fibers are covered on concreteadditives.net. Cement additives and grinding aids are covered on cementadditives.org. Asphalt and blacktop sealers are covered on asphaltadditives.net. Water chemistry for boilers, cooling towers and drinking water is covered on watertreatmentchemicals.net.

What do construction chemicals do on a structure?#

Construction chemicals perform 10 functions on a structure, listed below with the family that delivers each one.

• Waterproofing: membranes, cementitious and crystalline coatings and bentonite keep liquid water out.
• Repair: repair mortars, galvanic anodes and FRP systems restore section and rebar protection.
• Protection: sealers and protective coatings slow water, chloride and carbon dioxide ingress.
• Joining: sealants seal moving joints in facades, floors and pavements.
• Bedding: tile adhesives bond ceramic and stone tile to the substrate.
• Leveling: self-leveling underlayments and screeds produce flat floor surfaces.
• Finishing: renders, putties and resin floors form the final wearing or decorative surface.
• Curing: curing compounds hold mix water in fresh concrete.
• Form release: release agents stop concrete bonding to formwork.
• Fire protection: sprayed fire-resistive materials and intumescent coatings delay steel failure in fire.

Regional names for the same products#

The same product class carries a different name in the UK, the US, Germany and South Asia. Below-ground waterproofing is "tanking" in the UK, where BS 8102:2022 calls a barrier Type A, while "dampproofing" is a US code term (IRC 2024 R406.1) for a coating that only retards soil moisture. Render is stucco in the US, self-levelling compound is self-leveling underlayment, mould release is form release agent, and passive fire protection is fireproofing. US installers call cement-based tile adhesive "thinset", German makers group the whole field as Bauchemie, and "wall putty" names the South Asian cement putty, not mounting putty.

How Do Construction Chemicals Work?#

Construction chemicals work by 8 mechanisms: film formation, pore blocking and crystallization, hydrophobic impregnation, adhesion and bonding, volume control, electrochemical protection, endothermic and intumescent action, and elastic movement accommodation. One family can use two mechanisms, as waterproofing does with films and crystalline pore blocking. The table below maps each mechanism to how it works and to the families that rely on it.

EN 1504-9:2008 sets 11 principles for protecting and repairing concrete, and principles 7 to 11 address reinforcement corrosion. Which chemistries deliver these mechanisms?

Which chemistries are behind construction chemicals?#

Ten chemistry groups sit behind most product classes, and epoxy alone appears in 9 of the 15 families. Polyurethane and polyurea appear in 5 families, acrylics in 8, redispersible powders and cellulose ethers in 3 each, silanes and silicones in 4, and modified bitumen in 1. The table below names each material group and the families that use it.

Each material is described for its construction use only: its identity, its role in the cured product and its hazard line, not its production or its uses in other industries. Epoxy resin, for example, cures with an amine hardener into the binder of repair mortars, anchors and floors, while the same resin in other industries falls outside this site. Identity, hazard lines and family uses for all ten are indexed under construction chemistry.

15 Types of Construction Chemicals#

The 15 types of construction chemicals are waterproofing, concrete repair, injection, grouts, anchoring, sealants, tile installation, flooring, sealers, curing, release, bonding, dry-mix mortars, protective coatings and fireproofing, with 110 product classes between them. Flooring is the largest family with 16 classes and release the smallest with 3. Each family below names its function, its class range and the European and US documents that govern it.

1. Waterproofing: 13 classes that keep liquid water out#

Waterproofing keeps liquid water out of below-grade structures, roofs, decks and wet areas, and its 13 classes range from sheet waterproofing membranes to fluid-applied air and water-resistive barriers. BS 8102:2022 designs below-ground protection as Type A barrier, Type B structurally integral or Type C drained. EAD 030350-00-0402 assesses liquid roof kits in Europe, while ASTM C836/C836M-18(2022) covers buried liquid membranes and IBC 2024 1805 sets US foundation rules. Good waterproofing products are chosen by class: on the negative side, only cementitious or crystalline coatings or a drained cavity (Type C) work.

2. Concrete repair: 12 classes that restore section and protect rebar#

Concrete repair restores section, profile and rebar passivity and strengthens members, and its 12 classes range from concrete repair mortars to rebar corrosion protection coatings. EN 1504-3:2005 sorts repair mortars into classes R1 to R4, and an R4 mortar reaches at least 45 MPa (6,527 psi) compressive strength and 2.0 MPa (290 psi) bond. In the US, ASTM C928/C928M-25 covers rapid-hardening repair materials. EN 1504-3 R3 is unrelated to ASTM C928 Type R3, so a class letter never transfers between the two standards.

3. Injection: 6 classes for cracks, voids and slab lifting#

Injection fills or seals cracks and voids, stops active leaks and lifts slabs, and its 6 classes range from epoxy crack injection to polyurethane foam slab lifting. EN 1504-5:2004 is the edition cited in the Official Journal, and ASTM C881/C881M-20a classes epoxy by hardened concrete surface temperature: Class A below 4 °C (40 °F), B from 4 to 15 °C (40 to 60 °F) and C above 15 °C (60 °F). Epoxy suits dormant dry cracks, while polyurethane or acrylic suits wet or moving cracks.

4. Grouts: 4 classes that fill gaps without shrinkage#

Grouts fill gaps under baseplates and machinery and in post-tensioning ducts without shrinkage, and their 4 classes range from non-shrink grout to post-tensioning grouts. ASTM C1107/C1107M-26, active since 2026-09-15, sorts packaged non-shrink cementitious grout into Grades A, B and C by how it controls volume. EN 447:2007 covers grout for prestressing tendons in Europe. Tile grouts belong to the tile installation family, not to this one.

5. Anchoring: 6 classes that bond rods and rebar in drilled holes#

Anchoring bonds threaded rods and post-installed rebar in drilled holes in concrete, and its 6 classes range from epoxy anchoring adhesives to chemical anchor installation. In the US, ICC-ES AC308 (24), published April 2025, evaluates post-installed adhesive anchors with ACI CODE-355.4-24, and ICC-ES AC581 (24) with ACI CODE-355.5-24 covers post-installed reinforcing bars. EN 1504-6:2006 covers the anchoring of reinforcing bars in repair work in Europe. Resin types include epoxy, vinylester and urethane methacrylate.

6. Sealants: 9 classes for moving joints#

Sealants seal moving joints in facades, floors, pavements and glazing, and their 9 classes range from polyurethane sealants to semi-rigid joint fillers for industrial floors. ASTM C920-18(2024) rates elastomeric sealants by movement class from 12.5 to 100/50, so a Class 50 sealant takes ±50 % of the joint width. EN 15651-1 to -4:2012 are the harmonised European parts for facade, glazing, sanitary and pedestrian-walkway sealants. Joint width and depth are designed under ASTM C1193-25.

7. Tile installation: 7 classes for bedding, grouting and waterproofing tile#

Tile installation bonds, grouts and waterproofs ceramic and stone tile, and its 7 classes range from tile adhesive classes to uncoupling and crack-isolation membranes. EN 12004:2007+A1:2012 stays the CE marking basis, and a C2 adhesive reaches a tensile adhesion of at least 1 N/mm² (145 psi). In the US, ANSI A118.4-2023 and A118.15-2023 cover modified and improved modified mortars, and ANSI A118.10-2023 covers waterproof membranes. "Thinset" is the US name for cement-based tile mortar.

8. Flooring: 16 classes of resin floors, screeds and levelers#

Flooring creates wearing, chemical-resistant, decorative, level or conductive floor surfaces, and its 16 classes range from epoxy flooring to gypsum floor underlayments. EN 13813:2002 is the current European standard for screed material, and FeRFA sorts resin floors into Types 1 to 8, from a seal of 150 µm (5.9 mils) or less to heavy-duty systems over 6 mm (0.24 in). ASTM F3010-24 moisture mitigation membranes reach at most 0.10 perm (5.72 ng/(Pa·s·m²)). Slab moisture limits come from each product maker.

9. Sealers: 7 classes for surface protection and hardening#

Sealers reduce water and chloride ingress, dusting and wear on concrete, and their 7 classes range from penetrating sealers and water repellents to anti-graffiti coatings. EN 1504-2:2004 sorts surface protection into hydrophobic impregnation (H), impregnation (I) and coating (C). In the US, NCHRP Report 244 (1981) screens sealers by chloride uptake against uncoated concrete, and ASTM C779/C779M-19 is a comparative abrasion test, not a class. Silicate densifiers react with portlandite to C-S-H inside the surface.

10. Curing: 5 classes that hold mix water in fresh concrete#

Curing compounds retain mix water in fresh concrete, control evaporation and retard surfaces for exposed aggregate, and their 5 classes range from cure-and-seal compounds to the comparison of curing methods. ASTM C309-25 sets Types 1, 1-D and 2, and a Type 2 white-pigmented compound reaches a daylight reflectance of at least 60 %. ASTM C1315-25 covers cure-and-seal compounds with added sealing properties. ACI PRC-308-26 is the current ACI curing guide.

11. Release: 3 classes that stop concrete sticking to forms#

Release agents stop concrete bonding to formwork and casting beds, and their 3 classes range from release agents for precast and architectural concrete to stamped concrete release agents. Barrier agents, such as mineral oil, wax and silicone, separate the form physically, while chemically active agents contain fatty acids that react with lime in the cement paste. No product standard exists for release agents; ACI 347R-14 is the formwork guide that addresses them. Federal VOC rules still set a form-release limit.

12. Bonding: 6 classes that join new material to old#

Bonding agents improve adhesion of new mortar, concrete, screeds and coatings to existing substrates, and their 6 classes range from SBR latex to primers for self-leveling underlayments and screeds. ASTM C1059/C1059M-24 covers latex bonding agents in Type I (interior dry) and Type II (humid or immersed), and ASTM C881/C881M-20a covers epoxy bonding systems. EN 1504-4:2004 covers structural bonding in Europe. PVA bonding agents re-emulsify in water and are limited to interior dry use.

13. Dry-mix mortars: 5 classes of renders, putties and lime mortars#

Dry-mix mortars form renders, plasters, skim coats, putties, thin-bed and lime mortars and the base coats of EIFS, and their 5 classes range from wall putty and cementitious skim coats to lime mortars for repointing. EN 998-1:2016 is the harmonised European standard for rendering and plastering mortar, with compressive classes CS I to CS IV. In the US, ASTM C926-26 governs portland cement plaster (stucco). Wall putty here is the South Asian cement putty, not mounting putty.

14. Protective coatings: 7 classes for concrete and steel#

Protective coatings protect concrete and structural steel against carbonation, chlorides, chemicals and corrosion, and their 7 classes range from anti-carbonation coatings to anti-corrosion coating systems for structural steel. ISO 12944 (2017/2018 parts) rates atmospheric corrosivity C1 to C5 plus CX, immersion Im1 to Im4, and durability L (under 7 years), M (7 to 15), H (15 to 25) and VH (over 25 years). EN 1504-2:2004 covers coatings that protect concrete surfaces.

15. Fireproofing: 4 classes for steel and penetrations in fire#

Fireproofing delays structural steel and assembly failure in fire and seals penetrations and joints, and its 4 classes range from intumescent coatings for structural steel to fireproofing cost per square foot. US fire-resistance ratings come from ASTM E119-26 and UL 263 (14th edition), and penetration firestops are tested to ASTM E814-26 and UL 1479. EN 13381-4:2013 assesses passive protection of steel members in Europe. Ratings run from 1/2 h to 4 h.

Where Are Construction Chemicals Used? Uses by Structure and Problem#

Construction chemicals are used on 8 kinds of structure and problem: basements, flat roofs and terraces, parking structures, bridges, tunnels and marine structures, water-retaining structures, cracked concrete, spalling concrete and masonry, and each one draws on several families. The table below matches each structure or problem with its main water, load or damage mechanism and the families used; a specification should name each product by class and standard.

How the problem, substrate and standard decide the product#

Selection runs in 4 steps: name the problem, test the substrate, write the standard and class into the specification, then choose the buying route. The problem comes first. Water ingress points to waterproofing designed as BS 8102:2022 Type A, B or C; section loss points to a repair mortar class under EN 1504-3:2005, R3 or R4 for structural work; a moving crack points to polyurethane injection or a sealant, and a static structural crack to epoxy injection. Carbonation or chlorides point to EN 1504-2:2004 surface protection paired with an EN 1504-9:2008 principle.

The substrate then decides the chemistry. Surface texture is specified as one of 10 ICRI concrete surface profiles, CSP 1 to CSP 10 (ICRI 310.2R-2013), and the substrate must sit at least 3 °C (5.4 °F) above the dew point, measured on the surface (ISO 8502-4:2017). Slab moisture is measured with ASTM F2170-19a (relative humidity) or ASTM F1869-23 (vapor emission rate); neither method sets a pass/fail value, so the moisture limit is the product maker's. The required texture comes from the product data sheet, and the ten profiles are graded under concrete surface profile.

The standard then turns the choice into a specification. A European specification names the harmonised EN and class, such as EN 12004:2007+A1:2012 C2, and checks the declaration of performance; a US specification names the ASTM or ANSI standard and, for anchors and fire protection, the evaluation report or listed design. The last step is the buying route, which depends on how much of the result rests on the applicator.

Which families need a specialist applicator?#

Membranes, injection, resin floors, FRP strengthening and fireproofing go through trained applicators, while sealers, curing compounds and non-shrink grouts can be applied by the general contractor from distribution. The difference lies in how the result is made: a membrane, an injected crack or a resin floor reaches its rated performance only through surface preparation, mixing and film build on site. Fireproofing must match the tested design to the steel section. In the EU, every professional user of products with 0.1 % by weight or more diisocyanates, such as polyurethane membranes, injection resins and floors, needs documented training under REACH Annex XVII entry 74. A curing compound sprayed from a pack, by contrast, carries its performance in the product.

Which Standards and Rules Govern Construction Chemicals?#

Construction chemicals are governed by product standards (EN in Europe, ASTM and ANSI in the US), by approval routes (CE marking with a declaration of performance in the EU, evaluation reports and fire listings in the US) and by cross-cutting rules on VOC content and worker safety. The two routes run in parallel, so a product sold in both markets carries both sets of documents.

European standards, CE marking and the 2024 regulation#

A European construction chemical carries CE marking when a harmonised EN standard or a European Assessment Document covers it, and its declaration of performance names the edition assessed. The declaration states the declared values, such as the repair class or the adhesion class, against that edition. Declarations and the 2024 rules are explained under EU Construction Products Regulation.

Regulation (EU) 2024/3110 entered into force on 2025-01-07, and its main part applies from 2026-01-08. Harmonised standards cited under Regulation (EU) No 305/2011 keep applying to a product family until that family moves under the new regulation. Regulation (EU) No 305/2011 is repealed from 2026-01-08, except the articles and Annexes III and V listed in Article 94 of the new regulation, which are repealed from 2040-01-08.

CE marking uses specific editions: EN 12004:2007+A1:2012 for tile adhesives, EN 15651-1 to -4:2012 for sealants, EN 13813:2002 for screed material and EN 1504-5:2004 for injection products. The 2017 and 2013 CEN editions of these standards are current at CEN but not harmonised, so they do not appear on a declaration.

EN 1504 has 10 parts, from EN 1504-1:2005 (definitions) to EN 1504-10:2017 (site application and quality control), and parts 1, 8, 9 and 10 are not harmonised. EN 1504-9:2008 sets the 11 principles of repair and protection, and products are never declared compliant with it. The parts and principles are set out under EN 1504.

US specifications, evaluation reports and fire listings#

US projects specify construction chemicals by ASTM or ANSI standard and, for anchors and fire protection, by an evaluation report or a listed design. Sealants are specified to ASTM C920-18(2024), epoxy injection and bonding systems to ASTM C881/C881M-20a, and modified tile mortars to ANSI A118.4-2023.

Post-installed adhesive anchors need an evaluation report under ICC-ES AC308 (24), published April 2025, which works with ACI CODE-355.4-24. The report gives the bond strengths a designer uses; the data sheet alone does not.

Fire protection is specified by listed design: ASTM E119-26 and UL 263 (14th edition) are technically equivalent fire tests for beams, columns and assemblies. Rating tests are compared under UL 263 and ASTM E119.

VOC Limits and Safety Rules Across the 15 Families#

VOC limits for construction chemicals depend on jurisdiction and product category, from 50 g/L (0.42 lb/gal) for floor coatings and architectural sealants in the South Coast air district to 700 g/L (5.84 lb/gal) for curing and sealing compounds under the federal EPA rule. Safety rules add cement, epoxy, silica and diisocyanate duties for applicators.

VOC limits by product category and jurisdiction#

The South Coast AQMD sets the strictest US limits: Rule 1113 (amended 2016-02-05) for coatings and Rule 1168 (amended 2022-11-04) for sealants and tile adhesives. The table below compares the VOC limits in g/L (lb/gal) for nine categories across the South Coast rules, the federal EPA AIM rule and the EU Phase II limits.

The EPA AIM rule (40 CFR 59 subpart D) sets no federal VOC limit for adhesives or sealants, so sealants meet only state and district rules. EU Directive 2004/42/EC Phase II values apply to coatings within its scope, such as one-pack and two-pack reactive performance coatings at 140 g/L (1.17 lb/gal) water-based. Every category is listed under VOC limits for construction chemicals.

Cement, epoxy, silica and diisocyanate rules for applicators#

Cement-based products carry no harmonised EU classification; the ECHA C&L notified classification is H315, H317, H318, H335, and the product SDS governs each product. The full cement line reads: No Annex VI entry; ECHA C&L notified classification: H315, H317, H318, H335; see the product SDS. REACH Annex XVII entry 47 caps soluble chromium (VI) at 2 mg/kg (0.0002 %) of the total dry weight of the cement. Liquid epoxy resin (CAS 25068-38-6) carries a harmonised CLP Annex VI classification (index 603-074-00-8): H315, H317, H319, H411.

Cutting, grinding and mixing release respirable quartz (crystalline silica). OSHA 29 CFR 1926.1153 sets a permissible exposure limit of 50 µg/m³ as an 8-hour TWA and an action level of 25 µg/m³, effective 2016-06-23. The EU binding limit is 0.1 mg/m³ of the respirable fraction under Directive (EU) 2017/2398.

Diisocyanates in polyurethane and polyurea products fall under REACH Annex XVII entry 74 at 0.1 % by weight or more. The label statement applies since 2022-02-24, and training before industrial or professional use since 2023-08-24, renewed at least every 5 years. Polyurethane resins have no Annex VI entry as a class (see the product SDS), while isocyanate monomers carry harmonised H334 and H317. Training content and exposure limits are covered under diisocyanates rules.

Complete List of Construction Chemicals: All 15 Families and 110 Product Classes#

The complete list below gives all 15 families of construction chemicals with their function, number of product classes, main chemistries and the European and US documents that govern them.

Every standard is listed with its edition and status under construction chemicals standards. Class counts are the product-class pages of each family.

Installed costs differ by family, system, thickness and access, so this list carries no single cross-family price. Dated installed cost ranges, each with region, basis and source, sit on each family page and its cost page; without a dated range, the quote follows from area, thickness, details and access.

Which Construction Chemical Is Right for a Project?#

No single construction chemical is right for every project: the right product is the class rated for the problem, substrate, exposure and movement, named in the specification by standard and edition, not by brand. A cracked parking deck, for example, can need epoxy injection for dormant structural cracks, a sealant rated to ASTM C920-18(2024) for moving joints and a traffic coating against chlorides. Two products from different families are then compared by chemistry and by standard, and pairs such as epoxy vs polyurethane are set out under construction chemicals compared.

Is there one best chemical for concrete?#

No: concrete takes a sealer, a repair mortar, an injection resin or a coating depending on whether the problem is water, section loss, a crack or wear. Water and chloride ingress call for an EN 1504-2:2004 impregnation or coating, section loss for an EN 1504-3:2005 repair mortar, a dormant dry crack for epoxy injection and a wet or moving crack for polyurethane or acrylic. Epoxy is the wrong choice for cracks caused by corroding reinforcement.

How does a data sheet compare with a standard?#

A standard sets the class threshold, such as at least 45 MPa (6,527 psi) for an EN 1504-3:2005 R4 repair mortar, while a data sheet reports the values measured on one product. A product value is therefore read against the standard's threshold, never as the threshold itself.

Coverage on a data sheet means little without its basis. One US gallon at 100 % volume solids covers 1,604 ft² at 1 mil dry film thickness, which in metric equals 39.37 m²/L at 25.4 µm, because m²/L = 1,000 × volume solids / DFT in µm; dry film thickness equals wet film thickness times volume solids. Test procedures are indexed under application and test methods.

Is a brand name enough to specify a construction chemical?#

No: a specification names the product class and the standard, class and edition it must meet, and a brand question is answered by checking the declaration, report or data sheet against that standard. A tile adhesive, for example, is specified as EN 12004:2007+A1:2012 C2, and any product whose declaration shows C2 qualifies. A brand name without the class leaves the requirement open.

Are construction chemicals the same as building materials?#

No: drywall, insulation, construction adhesives, interior paint and wood finishes are general building or decorating materials, not construction chemicals as defined here. The difference lies in the job: a construction chemical protects, repairs, joins, beds, levels, finishes, cures, releases or fire-protects concrete, masonry or structural steel, while drywall, insulation and paint build or decorate the interior. Consumer caulks and tub sealants sold at retail fall outside the field as well.