I use Dicor Lap Sealant self-leveling to touch up fixtures on roof (vents, TV antenna, front and rear seams, etc). Now I want to caulk around some areas that appear to have a clear (but dirty) sealant. It does not appear to be a lap sealant. It is a factory sealant as original owner never sealed anything (although trailer was covered).These areas include, windows, side/front/rear marker lamps, rain gutter, water, TV,, 120V plug and several other items on sides of trailer. I know NOT to use silicone anywhere on an RV.What is preferred sealant for these areas?How to clean/prep these areas prior to application?Are there just two sealants used on trailers.....roof (lap, self leveling) and one for everything else?Is lap self leveling used on the last 4"-5" of front and rear seams (between front fiberglass section and rear wall) that are essentially vertical? I have a crowned roof. I was worried the self leveling sealant would drip down if applied on these areas. Currently it appears to be lap sealant (white, not clear).Thanks!

Lexel for the sides. Dicor for the roof.

Baja Man wrote:I know NOT to use silicone anywhere on an RV.Why not? Thats what Keystone RV that built your Outback uses for anything other than trim that touches roof membrane such as the top of the gutter rails /awning rails, or the front and rear term bar/angle. Keystone uses Tremco Trempro 645 everywhere else.TREMPRO 645

Pbutler97 wrote:Baja Man wrote:I know NOT to use silicone anywhere on an RV.Why not? Thats what Keystone RV that built your Outback uses for anything other than trim that touches roof membrane such as the top of the gutter rails /awning rails, or the front and rear term bar/angle. Keystone uses Tremco Trempro 645 everywhere else.TREMPRO 645Because silicone leaves behind a residue that is difficult to remove and nothing else will stick when touching up where silicone is/was.How do you know that Keystone uses Tremco?What do they use at rain gutter and other areas as you described?

I checked Lexel website but did not any reference to UV qualities. It appears to be more for home use.

Baja Man wrote:Pbutler97 wrote:Baja Man wrote:I know NOT to use silicone anywhere on an RV.Why not? Thats what Keystone RV that built your Outback uses for anything other than trim that touches roof membrane such as the top of the gutter rails /awning rails, or the front and rear term bar/angle. Keystone uses Tremco Trempro 645 everywhere else.TREMPRO 645Because silicone leaves behind a residue that is difficult to remove and nothing else will stick when touching up where silicone is/was.How do you know that Keystone uses Tremco?What do they use at rain gutter and other areas as you described?Because I've owned two Keystone trailers and I asked a factory rep at Hershey when I had them. The last one was a 2013 so they may have changed since.That silicone residue BS is just that....BS. RV forum nonsense.

Correct Sealant for Windows, Marker Lights, Rain Gutter, ?

Pbutler97
Explorer
Oct 12, 2022
Baja Man wrote:
Pbutler97 wrote:
Baja Man wrote:

I know NOT to use silicone anywhere on an RV.

Why not? Thats what Keystone RV that built your Outback uses for anything other than trim that touches roof membrane such as the top of the gutter rails /awning rails, or the front and rear term bar/angle. Keystone uses Tremco Trempro 645 everywhere else.

TREMPRO 645

Because silicone leaves behind a residue that is difficult to remove and nothing else will stick when touching up where silicone is/was.

How do you know that Keystone uses Tremco?
What do they use at rain gutter and other areas as you described?

Because I've owned two Keystone trailers and I asked a factory rep at Hershey when I had them. The last one was a 2013 so they may have changed since.

That silicone residue BS is just that....BS. RV forum nonsense.
Baja_Man
Explorer
Oct 12, 2022
I checked Lexel website but did not any reference to UV qualities. It appears to be more for home use.
Baja_Man
Explorer
Oct 12, 2022
Pbutler97 wrote:
Baja Man wrote:

I know NOT to use silicone anywhere on an RV.

Why not? Thats what Keystone RV that built your Outback uses for anything other than trim that touches roof membrane such as the top of the gutter rails /awning rails, or the front and rear term bar/angle. Keystone uses Tremco Trempro 645 everywhere else.

TREMPRO 645

Because silicone leaves behind a residue that is difficult to remove and nothing else will stick when touching up where silicone is/was.

How do you know that Keystone uses Tremco?
What do they use at rain gutter and other areas as you described?
Pbutler97
Explorer
Oct 12, 2022
Baja Man wrote:

I know NOT to use silicone anywhere on an RV.

Why not? Thats what Keystone RV that built your Outback uses for anything other than trim that touches roof membrane such as the top of the gutter rails /awning rails, or the front and rear term bar/angle. Keystone uses Tremco Trempro 645 everywhere else.

TREMPRO 645
joelc
Explorer III
Oct 12, 2022
Lexel for the sides. Dicor for the roof.

Forum Discussion

Correct Sealant for Windows, Marker Lights, Rain Gutter, ?

About Travel Trailer Group

Related Content

Window Sealant/Silcone

Correct Truck

Door window sealant needed.

Constantly correcting steering

Coachmen Viking problem & correction