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Water-Based Foundation Mastic

Del-Val 413

Emulsion Mastic Trowel-Grade

Light, Mastic Consistency for Below Grade Applications & Meets ASTM!


Del-Val 413 Trowel-Grade Emulsion Mastic a trowel-applied, mineral colloid, asphalt emulsion, is manufactured from refined asphalts and is reinforced with non-asbestos fibers and clays. Del-Val 413 Trowel-Grade Emulsion Mastic has a brown appearance when wet but will dry to a near black color. Asphalt emulsions are low odor alternatives to solvent-based coatings. Del-Val 413 applied directly from the container is corrosion-resistant, and waterproof when dry.

Make repairs to foundation walls prior to coating with this trowel-grade mastic.

Where to Use Del-Val 413 Emulsion Mastic Trowel-Grade

Quick Application Guide

ASTM Compliance


Type I
ASTM Compliance
Type II, Class I

Coverage Rate

40-50 FT2

Per Gallon (Per Coat)


Del-Val 413 Trowel-Grade Emulsion Mastic is ideal for reducing dampness and moisture infiltration through foundation walls, parapets, firewalls, tanks, culverts, cisterns, and bridge abutments. Del-Val 413 is applicable for above-grade cavity wall applications and below-grade masonry wall damp proofing and helps to minimize internal structural damage from mildew and mold. Suitable for “green” or slightly damp surfaces.


Surface should be free of oil, grease, dirt and other materials which would inhibit adhesion.


Apply with a contractor’s trowel or brush. Make sure apply in an evenly consistent application. Allow the mastic at least 36 hours before backfilling to allow the mastic time for curing.


Apply at the rate of approximately 40 – 50 ft.²/gal. (0.1 – 1.2 m²/L) (30 wet mils) per coat. Coverage will vary depending upon age, dryness and porosity of surface.

Code Approvals / Compliance

This product meets or exceeds the requirements of ASTM D1187, Type I & ASTM D1227, Type II, Class I.

Product Information

Sizes Available

5 Gallon Capacity Bucket

Tools Needed

Spackle Knife Tool Graphic
Trowel Tool Graphic


Available From These Distributors

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