HTR212/ H386-99 Laminating Resin

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QuartGallon5 Gallon
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RATIO: 100 pbw to 33 pbw

DLRH-3212 is an unfilled, clean epoxy resin system with a long pot life. DLRH-3212 is a tough, strong, impact resistant resin with chemical resistance. It has excellent wetting quality on kevlar, carbon graphite and fiberglass cloth. Used extensively in construction of aircraft, race cars, motorcycles, helmets and sports equipment. Mixing Ratio by Wt: 100:30; Pot Life (200 Gm MASS) 60 Min; Tensile Strength @ 25 C 12,500; Flexural Modulus @ 25 C 40,900; Heat Deflection 325 F; Thermal Shock 72F125F; Shore D: 80, Density: Resin: 9.7, Hardener: 7.9, Mixed: 9.1; Shelf Life: Resin/ Hardener 1 Year.

Ratio by Weight
100 pbw to 33 pbw
Pot Life
60 minutes
Heat Distortion Temperature

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WARNING: Cancer and Reproductive Harm -

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Use for making Engine plenum. Call to Mfr they insist on post cure of 50F rise per hr until 300F, then back to room temp to get the full Hi Temp capability. Thick like honey, but still wets very well. Very slow to cure, need to have heat lamps or heater to help cure. Will take 24hrs for sure even with heat lamps. Get heat lamps from chicken section at TSC! They Work great!!!

Dan K Verified Purchase

HTR212/H386-99 RESIN QT

May 26, 2023

Great online catalog. Easy to use. Fast delivery.

Dennis S
February 10, 2021

I use this resin extensively throughout our mid-sized UAV. I have always preferred MGS 285, but HTR works great for most parts and wets out almost as well. Unfortunately no choice of hardeners. Pot life is just long enough to layup wing-skins or thick, complicated carbon components Maybe 1hr tops before closing the mold or pulling vacuum. I really love the high temp resistance of this resin compared to MGS. Need to debond a fitting or joint? Hit it with the heat gun and pull it apart. The HTR part is uneffected, while West sys, 3M DP420 and others turn to putty. Simply put A pleasure to work with!

R. A
September 11, 2015


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this resin come with hardener? What is the cure temperature? Thanks

This is a kit, which has the resin and hardener. It is a room temp cure epoxy system.

Q: Which hardener does this HTR-212 laminating resin come with?

This kit comes with HTR-212 Resin and HT-386-99 hardener.

Q: Does this resin require a finishing resin coat? How does it compare to MGS regarding fabric wetting out? viscosity? Thanks.

Per the supplier: This resin is very clear. Most people use it for aftermarket parts. A lot of racing people like it as well. Viscosity at room temperature is about 1200cps. It wets out very nicely.

Q: Is there a safety data sheet available for this HTR-212 resin?

Yes, we have added it to the Documents section as a PDF.

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